Brake fluid leaking heavily when applying brakes

SOURCE: the checj engine light on my 99 pontiac sunfire

first of all, was the water on the passenger side from the air conditioner or a leak (what color was the fluid?)-the cap has to be tight, otherwise it will not hold pressure, so that has to be checked before you set off again-push down as you turn the cap clockwise, and it will not hurt to have water in the system (it actually transfers heat better than antifreeze) but it has a much lower boiling point, so the cap has to be tight. Pay attention to the temperature gauge and do NOT overheat it-it is an aluminum engine and they do not tolerate excessive heat. Take your time, no AC (although the AC being on can keep a good cooling system more stable since the radiator fan is forced on when the AC is running, so you can, within reason, experiment)-no matter what, just don't let it run hot-not worth it.

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SOURCE: 1999 Pontiac Bonneville SE 3800 ABS Brake pedal will eventually reach floor after stopping while hold car stopped. Brake pads replaced less than 5000 miles ago. Fluid level at max and does not drop. O

I would replace the MASTER CYLINDER. BLEED AIR from master cylinder BEFORE INSTALLATION. Hope this helps

SOURCE: Brake & ABS Warning LIght

There is a known failure of the ABS system control board which typically causes this problem. THere are companies out there that will rebuild your current board (if it's rebuildable). Do a search on ABS repair in Moscow, Iowa.

They will rebuild the module for $150.00 and warrant the repair for 5 years (as opposed to up to a $1000 form GM, and no guarantee as to how ling it will last.).

I did this to my '01 Tahoe and am real happy with it. The company offers diagnosis tests to help you determine if the problem is your ABS module.

Reply back what you find.

SOURCE: 97 Grand Am brakes.

it sounds like the master cylinder but belld the freont brakes firdt then the rear this may fix your problem good luck and safe driving if ANY doubt take it to a brake spelist as your daughters life is pressous . Lindz

SOURCE: I am drying to diagnose brake problem with 1993

yes it sounds like the problem it could maybe be the brake booster if the brakes are better at a higher idle but there is a check valve on the brake booster that cost 2.00 too replace that runs off vacume i would replace first